Search (2 results, page 1 of 1)

  • × author_ss:"Dresel, R."
  1. Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001) 0.03
    0.02964738 = product of:
      0.05929476 = sum of:
        0.05929476 = sum of:
          0.009374379 = weight(_text_:a in 261) [ClassicSimilarity], result of:
            0.009374379 = score(doc=261,freq=6.0), product of:
              0.053105544 = queryWeight, product of:
                1.153047 = idf(docFreq=37942, maxDocs=44218)
                0.046056706 = queryNorm
              0.17652355 = fieldWeight in 261, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                1.153047 = idf(docFreq=37942, maxDocs=44218)
                0.0625 = fieldNorm(doc=261)
          0.04992038 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
            0.04992038 = score(doc=261,freq=2.0), product of:
              0.16128273 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046056706 = queryNorm
              0.30952093 = fieldWeight in 261, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=261)
      0.5 = coord(1/2)
    
    Abstract
    Die deutschen Suchmaschinen, Abacho, Acoon, Fireball und Lycos sowie die Web-Kataloge Web.de und Yahoo! werden einem Qualitätstest nach relativem Recall, Precision und Availability unterzogen. Die Methoden der Retrievaltests werden vorgestellt. Im Durchschnitt werden bei einem Cut-Off-Wert von 25 ein Recall von rund 22%, eine Precision von knapp 19% und eine Verfügbarkeit von 24% erreicht
    Type
    a
  2. Grazia Colonia; Dimmler, E.; Dresel, R.; Messner, C.; Krobath, A.; Petz, S.; Sypien, M.; Boxen, P. van; Harders, M.; Heuer, D.; Jordans, I.; Juchem, K.; Linnertz, M.; Mittelhuber, I.; Schwammel, S.; Schlögl, C.; Stock, W.G.: Informationswissenschaftliche Zeitschriften in szientometrischer Analyse (2002) 0.00
    0.0011839407 = product of:
      0.0023678814 = sum of:
        0.0023678814 = product of:
          0.0047357627 = sum of:
            0.0047357627 = weight(_text_:a in 1075) [ClassicSimilarity], result of:
              0.0047357627 = score(doc=1075,freq=2.0), product of:
                0.053105544 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.046056706 = queryNorm
                0.089176424 = fieldWeight in 1075, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1075)
          0.5 = coord(1/2)
      0.5 = coord(1/2)